Well, to be more helpful than the dude offering to write your essay for you, you can go on numista and basically see all the coins from a while back.
https://en.numista.com/catalogue/ro...e-uni-1.html
Though I'm not sure what you mean exactly, the major change happened around 1969 when they changed to decimal coins, before that there wasn't much change for a long time. But maybe you mean in size/weight etc then there are differences that you can see.
https://en.numista.com/catalogue/ro...e-uni-1.html
Though I'm not sure what you mean exactly, the major change happened around 1969 when they changed to decimal coins, before that there wasn't much change for a long time. But maybe you mean in size/weight etc then there are differences that you can see.


















